I currently have two columns with several text entries - one column is the
'Category' column and the other is the 'Name' column. I've been able to find
out the most frequent string in Name by using the following

=INDEX(Name;MODE(IF(Name<"";MATCH(Name;Name;0))))

However, what I want to know is the most frequent Name for a specific
Category - for example, the most frequent Name string whenever the Category
string is "Buyer". I tried doing this by using SUMPRODUCT and multiplying the
Match(Name) value with (Category="Buyer") but that only returned #N/A (even
as an array,formula) so either I got the syntax wrong or I was thinking along
the wrong lines.

Any good ideas? Thanks.